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New approach to enhanced heat exchange efficiencies at ultralow temperatures

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New approach to enhanced heat exchange efficiencies at ultralow temperatures. / Burton, D.; Dow, R. C. M. ; Lambert, Colin.

In: Physical review B, Vol. 33, No. 11, 01.06.1986, p. 7803-7805.

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Burton, D. ; Dow, R. C. M. ; Lambert, Colin. / New approach to enhanced heat exchange efficiencies at ultralow temperatures. In: Physical review B. 1986 ; Vol. 33, No. 11. pp. 7803-7805.

Bibtex

@article{98f96be2d7f042fa966dce8b615139a7,
title = "New approach to enhanced heat exchange efficiencies at ultralow temperatures",
abstract = "We examine the heat transfer between a sintered metallic powder and liquid 3He at ultralow temperatures. With the combination of a renormalization-group approach with the Lanczos method, a microscopic model is analyzed to yield the low-frequency density of states ρ(ω) of the sinter. In the weak-coupling limit ρ(ω) possesses a pronounced low-frequency peak leading to an enhanced heat transfer coefficient at low temperatures. This enhancement is shown to occur when the ratio of the long-wavelength velocity of sound Cs in the sinter to its velocity Cb in the bulk metal is small and can be optimized by minimizing this ratio.",
author = "D. Burton and Dow, {R. C. M.} and Colin Lambert",
year = "1986",
month = jun,
day = "1",
doi = "10.1103/PhysRevB.33.7803",
language = "English",
volume = "33",
pages = "7803--7805",
journal = "Physical Review B: Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "AMER PHYSICAL SOC",
number = "11",

}

RIS

TY - JOUR

T1 - New approach to enhanced heat exchange efficiencies at ultralow temperatures

AU - Burton, D.

AU - Dow, R. C. M.

AU - Lambert, Colin

PY - 1986/6/1

Y1 - 1986/6/1

N2 - We examine the heat transfer between a sintered metallic powder and liquid 3He at ultralow temperatures. With the combination of a renormalization-group approach with the Lanczos method, a microscopic model is analyzed to yield the low-frequency density of states ρ(ω) of the sinter. In the weak-coupling limit ρ(ω) possesses a pronounced low-frequency peak leading to an enhanced heat transfer coefficient at low temperatures. This enhancement is shown to occur when the ratio of the long-wavelength velocity of sound Cs in the sinter to its velocity Cb in the bulk metal is small and can be optimized by minimizing this ratio.

AB - We examine the heat transfer between a sintered metallic powder and liquid 3He at ultralow temperatures. With the combination of a renormalization-group approach with the Lanczos method, a microscopic model is analyzed to yield the low-frequency density of states ρ(ω) of the sinter. In the weak-coupling limit ρ(ω) possesses a pronounced low-frequency peak leading to an enhanced heat transfer coefficient at low temperatures. This enhancement is shown to occur when the ratio of the long-wavelength velocity of sound Cs in the sinter to its velocity Cb in the bulk metal is small and can be optimized by minimizing this ratio.

U2 - 10.1103/PhysRevB.33.7803

DO - 10.1103/PhysRevB.33.7803

M3 - Comment/debate

VL - 33

SP - 7803

EP - 7805

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

SN - 1098-0121

IS - 11

ER -